Efficient butanol production without carbon catabolite repression from mixed sugars with Clostridium saccharoperbutylacetonicum N1-4

Takuya Noguchi, Yukihiro Tashiro, Tsuyoshi Yoshida, Jin Zheng, Kenji Sakai, Kenji Sonomoto

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Acetone-butanol-ethanol (ABE) fermentation using Clostridium saccharoperbutylacetonicum N1-4 and mixed sugars containing cellobiose and xylose was studied to establish efficient butanol production process without carbon catabolite repression (CCR). Although batch culture with glucose and xylose exhibited apparent CCR, we achieved simultaneous consumption of cellobiose and xylose. Moreover, preculture of the N1-4 strain with xylose yielded maximum butanol and solvent concentrations (16 and 23g/L, respectively). Thus, we succeeded in ABE fermentation with mixed sugars of hexose and pentose, without CCR, by using wild-type ABE-producing clostridia. We also investigated the effect of various ratios of cellobiose and xylose on the fermentation process and yield. Increasing initial xylose concentration improved butanol and solvent concentrations and maximum xylose consumption rate. Fed-batch culture with cellobiose and xylose showed rapid and simultaneous sugar consumption and improved maximum consumption rate of both sugars.

Original languageEnglish
Pages (from-to)716-721
Number of pages6
JournalJournal of Bioscience and Bioengineering
Issue number6
Publication statusPublished - Dec 1 2013


All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

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